Knife door structure and tobacco cutter
By introducing a pressure plate main body and a downward-extending guide surface into the knife gate structure of the tobacco shredder, the problem of uneven cutting of tobacco cake under horizontal feeding method is solved, achieving better compaction and fixing effect, preventing the slices from slipping, and improving the shredding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI CHINA TOBACCO INDUSTRY CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-12
AI Technical Summary
In horizontal feeding methods, the tobacco cake cannot be cut evenly during the shredding process, leading to the problem of the cakes slipping.
A knife gate structure is adopted, including a main body of the pressure plate and an extension. The extension extends downward and the distance gradually increases from top to bottom, which is used to press the tobacco sheet to ensure that the tobacco cake is compacted and fixed at the discharge port.
提高了烟饼的压实和固定效果，减少了烟饼与出料口角部的空隙，防止跑片，提升了切丝效果。
Smart Images
Figure CN224219421U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of tobacco processing equipment, and in particular to a knife gate structure and a tobacco leaf shredder. Background Technology
[0002] The shredder is an important piece of equipment in the tobacco industry. After being processed by the shredder, tobacco leaves are cut into shreds of a specified width, thereby changing the physical shape of the tobacco leaves and facilitating cigarette production.
[0003] Currently, horizontally fed tobacco shredders consist of a conveyor chain, a cutting gate, and a cutting roller. The tobacco leaves are compacted by the conveyor chain to form a tobacco cake, which is then conveyed to the cutting gate. The cutting gate forms an outlet, through which the tobacco cake extends and is cut into shredded tobacco by the cutting roller. Compared to the common vertical feeding method, in horizontal feeding, the tobacco cake is transported roughly horizontally to the cutting gate. This makes it difficult for the tobacco cake to be compacted under the pressure of the upper and lower cutting gates, resulting in uneven cutting of the tobacco leaves during the shredding process and causing the shredder to slip. Utility Model Content
[0004] The purpose of this invention is to provide a knife gate structure and a tobacco shredder that can solve the problems of uneven cutting and leaf slippage in horizontal feeding methods.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A knife gate structure for a tobacco leaf shredder, the knife gate structure comprising:
[0007] A tool holder that forms a discharge port;
[0008] A pressure plate is disposed on the top side wall of the discharge port. The pressure plate is used to press the tobacco sheet. The pressure plate includes a main body and an extension. Both ends of the bottom surface of the main body are connected to downwardly extending extensions. The distance between the two extensions gradually increases from top to bottom.
[0009] As an alternative to the above-mentioned knife gate structure, the extension is disposed on the bottom surface of the main body on the side closer to the discharge direction;
[0010] And / or, the distance between the two extensions gradually decreases along the discharge direction.
[0011] As an optional embodiment of the aforementioned knife gate structure, the maximum dimension of the extension along the discharge direction is 0.2 to 0.8 times the dimension of the main body along the discharge direction;
[0012] And / or, the maximum dimension of the extension along the discharge direction is 15mm-65mm.
[0013] As an alternative to the above-mentioned knife gate structure, the opposite side surfaces of the two extensions are guide surfaces, which are used to contact the tobacco sheet, and the guide surfaces are arc surfaces or inclined surfaces.
[0014] As an alternative to the aforementioned knife gate structure, the maximum height of the extension is 0.8-1.2 times the maximum height of the main body;
[0015] And / or, the maximum height of the extension is 15mm-25mm.
[0016] As an alternative to the aforementioned knife gate structure, the side of the main body facing away from the discharge port in the discharge direction is a concave avoidance arc surface, which is used to avoid the conveyor chain of the tobacco shredder.
[0017] As an alternative to the aforementioned knife gate structure, the radius of the avoidance arc surface is greater than or equal to the radius of the sprocket in the conveyor chain.
[0018] As an alternative to the above-mentioned knife gate structure, the side of the main body facing the front of the discharge port in the discharge direction is a clearance slope, which extends from top to bottom towards the front of the discharge direction.
[0019] As an alternative to the aforementioned knife gate structure, the angle between the avoidance slope and the vertical plane is greater than or equal to 30°.
[0020] A tobacco leaf shredder, comprising:
[0021] Conveyor chain, used for conveying tobacco leaves;
[0022] The aforementioned knife gate structure is located at the front end of the conveyor chain;
[0023] A shredding assembly is disposed on the front side of the knife gate structure along the conveying direction of the conveyor chain, and the shredding assembly is used to cut the tobacco leaves to form tobacco shreds.
[0024] The beneficial effects of this utility model are:
[0025] In the knife gate structure provided by this utility model, there are extensions extending downward at both ends of the bottom surface of the main body, and the distance between the two extensions is set to gradually increase from top to bottom. When the tobacco cake enters the discharge port under the conveying action of the conveyor chain, the tobacco cake can move closer to the middle of the discharge port under the action of the two extensions, which improves the compaction and fixing effect of the knife gate structure on the tobacco cake, reduces the probability of gaps appearing between the tobacco cake and the upper left and upper right corners of the discharge port, helps to prevent the tobacco cake from slipping, and improves the shredding effect.
[0026] The tobacco leaf shredder provided by this utility model adopts the above-mentioned blade structure, which helps to prevent the leaves from slipping and improve the shredding effect. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of the tobacco leaf shredder provided by this utility model;
[0028] Figure 2 This is a schematic diagram of the knife gate structure provided by this utility model;
[0029] Figure 3 This is a schematic diagram of the first structure of the pressure plate provided by this utility model;
[0030] Figure 4 This is a schematic diagram of the second structure of the pressure plate provided by this utility model;
[0031] Figure 5 This is a schematic diagram of the third structure of the pressure plate provided by this utility model;
[0032] Figure 6 This is a cross-sectional view of the pressure plate provided by this utility model;
[0033] Figure 7 This is a partial structural schematic diagram of the pressure plate provided by this utility model.
[0034] In the picture:
[0035] 1. Knife gate structure; 10. Discharge port; 11. Knife gate frame; 12. Pressure plate; 121. Main body; 1211. Avoidance arc surface; 1212. Avoidance slope surface; 1213. Fixing hole; 122. Extension part; 1221. Guide surface; 2. Conveyor chain; 21. Upper conveyor chain; 22. Lower conveyor chain; 3. Shredding assembly. Detailed Implementation
[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0040] like Figure 1 As shown, this embodiment provides a tobacco leaf shredder, including a knife gate structure 1, a conveyor chain 2, and a shredding assembly 3. The conveyor chain 2 is used to convey tobacco leaves and compress them into tobacco cakes. The conveyor chain 2, the knife gate structure 1, and the shredding assembly 3 are arranged sequentially along the conveying direction of the conveyor chain 2. The tobacco cakes move to the knife gate structure 1 under the conveying direction of the conveyor chain 2. The shredding assembly 3 is located in front of the knife gate structure 1 along the conveying direction of the conveyor chain 2, and the tobacco cakes are cut into shreds by the shredding assembly 3.
[0041] In some embodiments, the conveyor chain 2 includes an upper conveyor chain 21 and a lower conveyor chain 22, which are spaced apart in the vertical direction. The tobacco leaves are located between the upper conveyor chain 21 and the lower conveyor chain 22, and are moved by the friction between the upper conveyor chain 21 and the lower conveyor chain 22.
[0042] To facilitate the entry of tobacco leaves between the upper conveyor chain 21 and the lower conveyor chain 22, the distance between the upper conveyor chain 21 and the lower conveyor chain 22 gradually decreases along the conveying direction. This facilitates the entry of tobacco leaves while improving the compaction effect of the conveyor chain 2 on the tobacco leaves.
[0043] For ease of explanation, taking the conveying direction as the front-to-back direction as an example, the knife gate structure 1 is located in front of the conveying chain 2, the shredding assembly 3 is located in front of the knife gate structure 1, and the distance between the upper conveying chain 21 and the lower conveying chain 22 gradually decreases from back to front.
[0044] It should be noted that the shredding assembly 3 and the conveyor chain 2 are conventional structures in the art. In this embodiment, any structure and principle of the shredding assembly 3 and the conveyor chain 2 in the prior art can be used, which will not be described in detail here.
[0045] In some embodiments, such as Figure 2 As shown, the knife gate structure 1 is provided with a discharge port 10. The tobacco cake conveyed by the conveyor chain 2 passes through the discharge port 10 and is then cut into tobacco shreds by the shredding assembly 3. The tobacco cake passes through the discharge port 10, which can make the tobacco cake compacted under the constraint of the discharge port 10, which is beneficial to improving the shredding effect.
[0046] In some embodiments, the knife gate structure 1 includes a knife gate frame 11, which is an annular frame structure and is vertically arranged so that the tobacco cake can pass through the discharge port 10 approximately horizontally under the conveying chain 2.
[0047] Optionally, the knife gate frame 11 includes an upper knife gate and a lower knife gate arranged vertically, as well as two side knife gates arranged opposite each other in the left and right direction. The upper knife gate, the lower knife gate and the two side knife gates cooperate to form a discharge port 10. The shredding assembly 3 can cut the tobacco cake along the front side of the knife gate structure 1 to obtain tobacco shreds with the required width.
[0048] Because the tobacco cake is transported roughly horizontally to the knife gate structure 1 in the horizontal feeding method, it is not easy for the tobacco cake to be compacted under the pressure of the upper and lower knife gates. This results in gaps between the tobacco cake and the upper left and upper right corners of the discharge port 10, which causes the tobacco leaves to be cut evenly during the shredding process, resulting in the problem of the shredder running out of pieces.
[0049] To solve the above problems, such as Figure 3 As shown, the knife gate structure 1 also includes a pressure plate 12, which is disposed on the top side wall of the discharge port 10. The pressure plate 12 is used to press the tobacco sheet. The pressure plate 12 includes a main body 121 and an extension 122. Both ends of the bottom surface of the main body 121 are connected to downwardly extending extensions 122, and the distance between the two extensions 122 gradually increases from top to bottom. By using the downwardly extending extensions 122 at both ends of the bottom surface of the main body 121, and setting the distance between the two extensions 122 to gradually increase from top to bottom, when the tobacco cake enters the discharge port 10 under the conveying action of the conveyor chain 2, the tobacco cake can move closer to the middle of the discharge port 10 under the action of the two extensions 122, thereby improving the compaction and fixing effect of the knife gate structure 1 on the tobacco cake, reducing the probability of gaps appearing between the tobacco cake and the upper left and upper right corners of the discharge port 10, which helps to prevent the tobacco sheet from slipping and improve the shredding effect.
[0050] In some embodiments, such as Figure 4 and Figure 5As shown, the extension 122 is located on the bottom surface of the main body 121 near the discharge direction. That is, the extension 122 is located at the front end of the bottom surface of the main body 121. This arrangement results in a larger rear end space and a smaller front end space at the discharge port 10, which facilitates the entry of the tobacco cake into the discharge port 10 under the conveying action of the conveyor chain 2. As the tobacco cake moves forward after entering the discharge port 10, it is drawn towards the center of the discharge port 10 by the extension 122, thus eliminating gaps at the upper left and upper right corners of the discharge port 10, preventing chip slippage, and improving the shredding effect.
[0051] In some embodiments, the maximum dimension of the extension 122 along the discharge direction is 0.2 to 0.8 times the dimension of the main body along the discharge direction. The discharge direction is the opening direction of the discharge port 10.
[0052] Combination Figure 2 and Figure 5 As shown, the discharge direction is front-to-back, and the maximum dimension of the extension 122 in the front-to-back direction is 0.2 to 0.8 times the dimension of the main body 121 in the front-to-back direction. Within this range, the extension 122 has a good guiding effect on the tobacco cake moving towards the center, which helps to eliminate the gap between the tobacco cake and the top of the knife gate structure 1, helps to prevent the tobacco cake from slipping, and improves the shredding effect.
[0053] For example, the maximum dimension L1 of the extension 122 in the front-rear direction is 0.2 times, 0.3 times, 0.4 times, 0.5 times, 0.6 times, 0.7 times, and 0.8 times the dimension L2 of the main body 121 in the front-rear direction. It is understood that the above values are just some typical values, but are not limited thereto, and the specific dimension of the extension 122 in the front-rear direction can be set according to actual needs.
[0054] In some embodiments, the maximum dimension L1 of the extension along the discharge direction is 15mm-65mm, for example 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm.
[0055] In some embodiments, the maximum dimension L1 of the main body 121 along the discharge direction can be 70mm-90mm, for example 70mm, 75mm, 80mm, 85mm or 90mm.
[0056] In some embodiments, the distance between the two extensions 122 gradually decreases along the discharge direction. That is, the distance between the two extensions 122 gradually decreases from back to front. This arrangement can improve the effect of the tobacco cake converging towards the center of the discharge port 10, thereby helping to eliminate the gap between the tobacco cake and the top of the knife gate structure 1, preventing the tobacco cake from slipping, and improving the shredding effect.
[0057] In some embodiments, the opposing surfaces of the two extensions 122 are guide surfaces 1221, meaning that the guide surface 1221 is formed on the side surface of each extension 122 facing the other extension 122, and the guide surface 1221 is used to contact the tobacco sheet. The distance between the two guide surfaces 1221 gradually increases from top to bottom, and gradually decreases along the discharge direction. This arrangement helps to reduce the size of the top of the discharge port 10, improves the compaction effect of the discharge port 10 on the tobacco cake, and thus causes the tobacco cake to move closer to the center of the discharge port 10, avoiding gaps at the top.
[0058] Optionally, the guide surface 1221 can be an arc surface or an inclined surface. By setting the guide surface 1221 to an arc surface or an inclined surface, it is beneficial to guide the tobacco cake toward the center of the discharge port 10.
[0059] like Figure 6 and Figure 7 As shown, the guide surface 1221 extends from the main body 121 to the lower front side. When the smoke cake moves from the rear to the front side, the two front ends of the top of the smoke cake will move along the guide surface 1221. Under the guidance of the guide surface 1221, they will move towards the center of the front side to fully compact the smoke cake, ensure the contact effect between the smoke cake and the pressure plate 12, and avoid gaps between the smoke cake and the pressure plate 12.
[0060] In some embodiments, the maximum height h of the extension 122 is 0.8-1.2 times the maximum height H of the main body, so as to ensure the compaction effect at the top corner of the smoke cake and help eliminate the gap between the smoke cake and the pressure plate 12.
[0061] For example, the maximum height h of the extension 122 can be 0.8 times, 0.9 times, 1 time, 1.1 times or 1.2 times the maximum height H of the main body.
[0062] In some embodiments, the maximum height h of the extension 122 can be 15mm-25mm, for example 15mm, 20mm, 25mm.
[0063] In some embodiments, such as Figure 6 As shown, the side of the main body 121 facing away from the discharge direction is a concave avoidance arc surface 1211, which is used to avoid the conveyor chain 2 of the tobacco shredder.
[0064] Specifically, the upper conveyor chain 21 is located near the pressure plate 12. The upper conveyor chain 21 includes an upper sprocket, which is tensioned and drives the upper chain to move, thereby transferring the tobacco cake. To ensure the conveying accuracy of the tobacco cake by the upper conveyor chain 21 and to ensure that the tobacco cake smoothly enters the discharge port 10, the upper sprocket is positioned close to the pressure plate 12. The avoidance arc surface 1211 is designed as a concave arc surface to avoid the upper sprocket, which helps to tighten the distance between the upper sprocket and the knife gate structure 1, thus ensuring the conveying accuracy of the tobacco cake.
[0065] To improve the avoidance effect of the avoidance arc surface on the upper sprocket, the diameter of the avoidance arc surface is greater than or equal to the radius of the upper sprocket, so as to better avoid the upper sprocket.
[0066] Optionally, the radius of the avoidance arc surface can be greater than or equal to 70 mm, preferably greater than or equal to 75 mm, so as to be compatible with most models of sprockets in existing tobacco leaf shredders.
[0067] In some embodiments, the side of the main body 121 facing the front of the discharge direction is a relief slope 1212, which extends obliquely from top to bottom towards the front of the discharge direction. The relief slope 1212 can avoid the shredding assembly 3, avoid interference with the shredding assembly 3, and ensure smooth shredding.
[0068] In some embodiments, the shredding assembly 3 includes a shredding roller, which is rotatably disposed on the front side of the knife gate structure 1. When the shredding roller rotates, it drives the blades on its outer peripheral surface to move, so as to achieve shredding.
[0069] To improve the avoidance effect of the inclined plane on the slicing roller, in some embodiments, the angle between the inclined plane and the vertical plane is greater than or equal to 30°, so as to better avoid the slicing roller.
[0070] In some embodiments, the pressure plate 12 is provided with a through fixing hole 1213, which is used to cooperate with a fastener to fix the pressure plate 12 to the knife gate 11.
[0071] Alternatively, the fastener may be a screw or a pin.
[0072] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A knife gate structure for a tobacco leaf shredder, characterized in that, The knife gate structure includes: A tool holder (11) is provided, which forms a discharge port (10); A pressure plate (12) is disposed on the top side wall of the discharge port (10). The pressure plate (12) is used to press the tobacco sheet. The pressure plate (12) includes a main body (121) and an extension (122). Both ends of the bottom surface of the main body (121) are connected to downwardly extending extensions (122). The distance between the two extensions (122) gradually increases from top to bottom.
2. The knife gate structure according to claim 1, characterized in that, The extension (122) is disposed on the bottom surface of the main body (121) on the side near the discharge direction; And / or, the distance between the two extensions (122) gradually decreases along the discharge direction.
3. The knife gate structure according to claim 2, characterized in that, The maximum dimension of the extension (122) along the discharge direction is 0.2 to 0.8 times the dimension of the main body (121) along the discharge direction; And / or, the maximum dimension of the extension (122) along the discharge direction is 15mm-65mm.
4. The knife gate structure according to any one of claims 1-3, characterized in that, The opposite side surface of the two extensions (122) is a guide surface (1221), which is used to contact the tobacco sheet. The guide surface (1221) is an arc surface or a slope surface.
5. The knife gate structure according to any one of claims 1-3, characterized in that, The maximum height of the extension (122) is 0.8-1.2 times the maximum height of the main body (121); And / or, the maximum height of the extension (122) is 15mm-25mm.
6. The knife gate structure according to any one of claims 1-3, characterized in that, The side of the main body (121) facing away from the discharge port (10) in the discharge direction is a concave avoidance arc surface (1211), which is used to avoid the conveyor chain (2) of the tobacco shredder.
7. The knife gate structure according to claim 6, characterized in that, The radius of the avoidance arc surface (1211) is greater than or equal to the radius of the sprocket in the conveyor chain (2).
8. The knife gate structure according to any one of claims 1-3, characterized in that, The side of the main body (121) facing the discharge port (10) in the discharge direction is a relief slope (1212), which extends from top to bottom towards the front of the discharge direction.
9. The knife gate structure according to claim 8, characterized in that, The angle between the avoidance slope (1212) and the vertical plane is greater than or equal to 30°.
10. A tobacco leaf shredder, characterized in that, include: Conveyor chain (2) is used to convey tobacco leaves; The knife gate structure as described in any one of claims 1-9 is located at the front end of the conveying chain (2); A shredding assembly (3) is disposed on the front side of the knife gate structure along the conveying direction of the conveying chain (2). The shredding assembly (3) is used to cut the tobacco leaves to form tobacco shreds.